Ruler/template/mathematical aid



FIGS. 1 to 5 depict a metric version of the design.

FIG. 1 is a front view of a metric ruler/template/mathematical aid showing printed alphanumerics.

FIG. 2 is a front view thereof without the printed alphanumerics.

FIG. 3 is a perspective front view thereof.

FIG. 4 is a sectional view through BB of FIG. 2.

FIG. 5 is a sectional view through AA of FIG. 2.

FIGS. 6 to 11 depict an imperial version of the design.

FIG. 6 is a front view of an Imperial ruler/template/mathematical aid showing printed alphanumerics.

FIG. 7 is a front view thereof, without the printed alphanumerics.

FIG. 8 is a rear view thereof.

FIG. 9 is a front perspective view thereof.

FIG. 10 is a side view thereof; and,

FIG. 11 is a plan view thereof. 

The ornamental design for ruler/template/mathematical aid, as shown and described. 